Breadcrumb Home > Dictionary > Index S smart ass: Meaning and Definition of Find definitions for: smart' ass" Pronunciation: [key] — Slang (sometimes vulgar) Slang (sometimes vulgar). a wise guy; know-it-all. smart-ass Pronunciation: (smärt'as"), [key] — Slang (sometimes vulgar) Slang (sometimes vulgar). —adj. characteristic of a smart ass or wise guy. —n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. smart aleck smart bomb TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: inimical Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language